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100 AWS Interview Questions and Answers

DevOps, Cloud & Tools · 100 questions, each with a full written answer — free, no sign-up.

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Basic 20Intermediate 20Advanced 20Expert 20Guru 20

Basic

  1. What is AWS?
  2. What are the key components of AWS?
  3. Can you name some popular AWS services?
  4. What is Amazon EC2, and what are its main features?
  5. What is Amazon S3, and how is it different from EBS?
  6. Explain the difference between public, private, and elastic IP addresses in AWS.?
  7. What is a Virtual Private Cloud (VPC)?
  8. What is AWS IAM, and why is it important?
  9. What is an Amazon Machine Image (AMI)?
  10. How do you secure data in AWS? Name a few best practices.?
  11. What is an AWS Region, and what are Availability Zones?
  12. Explain the concept of auto-scaling in AWS.?
  13. What is AWS Lambda, and what are some of its use cases?
  14. What is the role of an AWS Key Pair?
  15. What is Amazon RDS, and what are some supported databases?
  16. What is Amazon CloudFront, and how does it work?
  17. What is Amazon Route 53, and what is its primary function?
  18. What are AWS security groups, and how do they differ from network ACLs?
  19. What is the difference between Amazon S3 and Glacier storage classes?
  20. How can you monitor AWS resources, and what are some monitoring tools available?

Intermediate

  1. What are the differences between Instance Store and EBS-backed instances in EC2?
  2. How do you create a custom Amazon Machine Image (AMI), and what are the benefits of using custom AMIs?
  3. Explain the difference between a launch configuration and a launch template in Auto Scaling.?
  4. What are the benefits of using Amazon S3 Transfer Acceleration?
  5. Explain how Amazon RDS Multi-AZ deployments help in achieving high availability and failover support.?
  6. What is the purpose of an AWS VPC peering connection, and how does it work?
  7. What are AWS Lambda triggers, and how do they help in invoking a Lambda function?
  8. Explain the process of setting up an Amazon CloudFront distribution with an S3 origin.?
  9. What is Amazon API Gateway, and how does it help in creating, publishing, and managing APIs?
  10. Explain the difference between provisioned IOPS and general purpose SSD EBS volumes.?
  11. How do you implement a cross-region replication strategy for Amazon S3?
  12. Describe AWS Elastic Beanstalk and its benefits for application deployment.?
  13. What is the use of Amazon S3 object versioning, and how can it help in recovering deleted or overwritten objects?
  14. Explain the process of monitoring and managing costs in AWS using Cost Explorer and AWS Budgets.?
  15. What are the differences between Amazon EFS and Amazon EBS, and when should you use each?
  16. How do you implement an AWS VPC using different subnets across multiple availability zones?
  17. What is AWS CloudFormation, and how does it help in managing AWS infrastructure?
  18. Describe the process of using Amazon RDS performance insights for database monitoring and optimization.?
  19. Explain the use of Amazon Kinesis Data Firehose for near-real-time data streaming.?
  20. What is AWS CodeStar, and how can it help in managing the software development process?

Advanced

  1. How can you optimize the performance of an Amazon RDS instance using parameter groups and performance tuning techniques?
  2. Explain the difference between AWS Snowball, Snowmobile, and DataSync for data migration and transfer.?
  3. Describe the process of implementing an Amazon S3 lifecycle policy for automatic data archiving and deletion.?
  4. How do you set up and use AWS WAF (Web Application Firewall) to protect your web applications?
  5. What is AWS Fargate, and how does it differ from running containers on Amazon EC2 instances using ECS?
  6. How can you use AWS Organizations to manage multiple accounts and implement service control policies?
  7. Describe the use of Amazon Aurora Global Database for cross-region high availability and disaster recovery.?
  8. How do you ensure data durability and fault tolerance with Amazon EFS?
  9. Explain the difference between AWS Batch and AWS Lambda for executing background tasks and workloads.?
  10. How can you use AWS X-Ray to analyze and debug distributed applications?
  11. What is AWS PrivateLink, and how does it help in secure communication between VPCs and AWS services?
  12. Explain the process of setting up and using AWS Certificate Manager (ACM) for managing SSL/TLS certificates.?
  13. Describe the use of Amazon GuardDuty for intelligent threat detection and continuous monitoring.?
  14. What is the AWS Transit Gateway, and how does it help in connecting multiple VPCs and on-premises networks?
  15. How do you set up and manage AWS Backup for centralized backup and restore services?
  16. Explain how AWS CodeDeploy helps automate software deployment to Amazon EC2 instances, on-premises instances, or serverless Lambda functions.?
  17. What is AWS AppConfig, and how does it help in managing application configurations and deployment strategies?
  18. Describe the process of implementing Amazon Macie for discovering, classifying, and protecting sensitive data in AWS.?
  19. How can you use AWS Glue for running ETL (Extract, Transform, Load) jobs on data stored in AWS services?
  20. Explain the use of AWS Trusted Advisor for optimizing AWS infrastructure and identifying cost-saving opportunities.?

Expert

  1. How do you design a multi-tier application architecture in AWS using a combination of services like EC2, RDS, and ELB?
  2. Explain the concept of AWS Serverless Application Model (SAM) and how it simplifies the deployment of serverless applications.?
  3. What are the primary considerations for choosing between AWS Lambda and Amazon ECS for running containers and serverless workloads?
  4. How do you set up and configure cross-account access using AWS IAM roles?
  5. Explain the process of implementing AWS Direct Connect for hybrid cloud architectures, and what are its advantages over VPN connections?
  6. What is Amazon FSx, and how does it differ from Amazon EFS and EBS for file storage?
  7. Describe the use of Amazon SageMaker for building, training, and deploying machine learning models in AWS.?
  8. How can you use AWS Secrets Manager to manage and rotate secrets like database credentials and API keys?
  9. Explain the process of integrating AWS Cognito with API Gateway to secure access to your APIs.?
  10. How can you optimize Amazon Redshift performance for large-scale data warehousing and analytics workloads?
  11. Describe the process of setting up AWS Global Accelerator for improving the performance and availability of your applications.?
  12. What is AWS Control Tower, and how does it help in setting up and managing multi-account AWS environments?
  13. Explain how Amazon QLDB (Quantum Ledger Database) works and its use cases.?
  14. How do you implement AWS Shield for protecting against DDoS attacks and other security threats?
  15. What is AWS Outposts, and how does it help in extending AWS infrastructure to on-premises environments?
  16. Describe the use of AWS Lake Formation for building and managing data lakes in AWS.?
  17. Explain how to use Amazon Timestream for time-series data analysis and its benefits over traditional databases for this use case.?
  18. How can you implement fine-grained access control for Amazon S3 buckets and objects using AWS IAM policies and S3 bucket policies?
  19. What is the AWS Well-Architected Tool, and how does it help in evaluating and improving your cloud architecture?
  20. Explain the process of using AWS Database Migration Service (DMS) for migrating databases to and from AWS with minimal downtime.?

Guru

  1. How do you implement a multi-region, active-active architecture in AWS for high availability and disaster recovery?
  2. Describe the process of setting up and using AWS Private 5G for on-premises mobile connectivity and edge computing.?
  3. How can you use AWS Greengrass to extend AWS services to edge devices and enable local processing of data?
  4. Explain the concept of Amazon Neptune and how it is used for graph database applications.?
  5. What is the role of AWS Transit Gateway in implementing complex networking scenarios for connecting multiple VPCs, VPNs, and Direct Connect?
  6. How can you use Amazon EMR (Elastic MapReduce) for processing vast amounts of data using distributed computing frameworks like Apache Hadoop and Apache Spark?
  7. Explain the process of integrating AWS KMS (Key Management Service) with other AWS services for encryption key management and protection of data.?
  8. Describe the process of setting up and using AWS Ground Station for satellite data processing and analysis.?
  9. How can you use AWS Wavelength for low-latency applications and edge computing with 5G networks?
  10. What are the best practices for implementing AWS Organizations to manage multiple AWS accounts and enforce security and compliance policies across the organization?
  11. Explain the process of setting up and using AWS AppConfig for feature flag management, A/B testing, and phased deployments of application configurations.?
  12. Describe the use of AWS IoT Core for building and managing Internet of Things (IoT) applications in AWS.?
  13. How can you use Amazon Forecast for time-series data forecasting and its benefits over traditional forecasting methods?
  14. Explain the role of Amazon Rekognition for image and video analysis and its use cases in real-world applications.?
  15. How can you use AWS Service Catalog to create and manage catalogs of IT services that are approved for use on AWS?
  16. What is AWS Snowcone, and how does it help in edge computing and data migration scenarios?
  17. Explain the process of setting up and using AWS RoboMaker for robotics application development and deployment.?
  18. How do you use AWS DMS (Database Migration Service) to perform a homogenous or heterogeneous database migration with minimal downtime?
  19. Describe the process of implementing AWS Fargate Spot for running containerized workloads at a reduced cost.?
  20. How can you use AWS Inferentia and Amazon EC2 Inf1 instances to optimize the cost and performance of machine learning inference workloads?
📕 Buy this interview preparation book: 100 AWS questions & answers — PDF + EPUB for $5
Reading is step one. Saying it out loud is the interview. Our AI interviewer calls your phone and runs a realistic AWS interview — then scores it.
📞 Practice AWS — free 15 min
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